Enhanced photoelectrochemical response of CdSe quantum dot-sensitized p-type NiO photocathodes

Title
Enhanced photoelectrochemical response of CdSe quantum dot-sensitized p-type NiO photocathodes
Author(s)
안광순박민아이수용김재홍Soon-Hyung Kang[Soon-Hyung Kang]Hyunsoo Kim[Hyunsoo Kim]Chel-Jong Choi[Chel-Jong Choi]
Keywords
SOLAR-CELLS; HYDROGEN GENERATION; WATER; EFFICIENCY; NANOTUBES; FILMS
Issue Date
201408
Publisher
WILEY-V C H VERLAG GMBH
Citation
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE, v.211, no.8, pp.1868 - 1872
Abstract
CdSe quantum dots (QDs) were deposited on a p-type nanoporous NiO surface by repeating the successive ionic layer adsorption and reaction (SILAR) procedure from 6 to 15 cycles. All of the CdSe QD-assembled NiO films exhibited much better p-type photoelectrochemical (PEC) performances than the bare NiO film. In particular, the NiO film with CdSe QD prepared from the 12 SILAR cycles exhibited a significantly enhanced p-type PEC response, due to an effective light absorption in the long wavelengths and the increased loading amount of the assembled QDs. However, as the SILAR cycles further increased up to 15, the QD-assembled NiO film exhibited the reduced PEC performance, despite better light absorption in the long wavelengths. This was because of the suppressed ion transport, poor charge transfer, and non-active aggregated QDs, facilitating the recombination reaction. (C) 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
URI
http://hdl.handle.net/YU.REPOSITORY/31240http://dx.doi.org/10.1002/pssa.201330601
ISSN
1862-6300
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공과대학 > 화학공학부 > Articles
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